Thanks to the joint efforts made by the leaders of China and the US over recent years, mutually _______ Sino-US relations have made remarkable progress.
Seeing the ______ of children playing together on the beach, I felt so happy.
---Why is he absent from school today? ---Because he _______ for a spinal injury in hospital.
People are beginning to move to Chuangyecheng. It is said that there will be twice ______ in Donghu.
–Excuse me, could I use your dictionary to look up a couple of words? --_______.
Bill fell ___ love with a girl named Rebecca chatting on the Internet, though they never talk to each face ____ face.